I need to file 2014, and 2015 taxes, am I able to do this myself on turbotax???

The TurboTax online editions are only for tax year 2016.

To complete a 2014 and 2015 tax return using TurboTax you will need to purchase and download each tax year separately from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/

A prior year tax return can only be printed and mailed, it cannot be e-filed.

When completing multiple tax years use a separate envelope for each tax year when mailing.

Thank you!!!!

You can't do it online.
Turbotax Online works only for current year (2016) taxes, and not for any other year.
If you want to use TurboTax for any other year you will need to purchase the Desktop Version for each year that you need to file. You can do that at this link:
http://shop.turbotax.intuit.com/personal-taxes/past-years-products.jsp

You can download the Forms and Instructions free from the IRS web site at this link:
http://www.irs.gov/app/picklist/list/priorFormPublication.html

In any event, you have to file the return by mail. Turbotax does not support e-file of prior year returns. Tip: If you prepare multiple years of prior returns, mail each one to the IRS in a separate envelope to be sure that each one is recognized as a separate tax return.

Thank you!!!!

I have the list of some of the forms you might need if you want to do it for free by hand.

2015
Here are some blank forms & instructions for 2015
1040 <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/f1040--2015.pdf">https://www.irs.gov/pub/irs-prior/f1040--2015.pdf</a>     Instructions <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/i1040gi--2015.pdf">https://www.irs.gov/pub/irs-prior/i1040gi--2015.pdf</a>

1040A <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/f1040a--2015.pdf">https://www.irs.gov/pub/irs-prior/f1040a--2015.pdf</a>    Instructions <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/i1040a--2015.pdf">https://www.irs.gov/pub/irs-prior/i1040a--2015.pdf</a>

1040EZ <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/f1040ez--2015.pdf">https://www.irs.gov/pub/irs-prior/f1040ez--2015.pdf</a>    Instructions <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/i1040ez--2015.pdf">https://www.irs.gov/pub/irs-prior/i1040ez--2015.pdf</a>

2015 Tax Tables <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/i1040tt--2015.pdf">https://www.irs.gov/pub/irs-prior/i1040tt--2015.pdf</a>
Publication 17 Tax Guide for 2015 <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/p17--2015.pdf">https://www.irs.gov/pub/irs-prior/p17--2015.pdf</a>

2014
Here are some blank forms & instructions for 2014
1040 <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/f1040--2014.pdf">https://www.irs.gov/pub/irs-prior/f1040--2014.pdf</a>     Instructions <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/i1040gi--2014.pdf">https://www.irs.gov/pub/irs-prior/i1040gi--2014.pdf</a>

1040A <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/f1040a--2014.pdf">https://www.irs.gov/pub/irs-prior/f1040a--2014.pdf</a>    Instructions <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/i1040a--2014.pdf">https://www.irs.gov/pub/irs-prior/i1040a--2014.pdf</a>

1040EZ <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/f1040ez--2014.pdf">https://www.irs.gov/pub/irs-prior/f1040ez--2014.pdf</a>    Instructions <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/i1040ez--2014.pdf">https://www.irs.gov/pub/irs-prior/i1040ez--2014.pdf</a>

2014 Tax Tables <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/i1040tt--2014.pdf">https://www.irs.gov/pub/irs-prior/i1040tt--2014.pdf</a>
Publication 17 Tax Guide for 2014 <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-prior/p17--2014.pdf">https://www.irs.gov/pub/irs-prior/p17--2014.pdf</a>